[OpenAFS] Re: experience of SQLite on AFS

[Andrew Deason]

On Sun, 25 Apr 2010 21:19:24 -0400
Jeffrey Altman <jaltman@secure-endpoints.com> wrote:

> On 4/24/2010 4:23 PM, Adam Megacz wrote:
> 
> > Me too, but my hopes are not high.  The fact that the databases
> > become corrupted when using whole-file locks only suggests that
> > there is a more subtle problem lurking here.
> > 
> 
> Actually it is a well understood problem.  I just didn't realize that
> the unix cm had it.
> 
> When a whole file lock is write-held, all of the dirty data in the
> cache must be written back to the file server before the lock is
> released. This is currently not being done and as a result, the
> database becomes corrupted.

If I understand Simon correctly, clients are also not getting file
updates while the file is opened O_RDWR. That would still seem to be a
problem even if we flush on unlock.

-- 
Andrew Deason
adeason@sinenomine.net